XC9215/9216/9217 Series
500mA Synchronous Step-Down DC/DC Converters
May 13, 2004 V4
* GO (Green Operation) Compatible
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Synchronous Step-down DC/DC
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High Efficiency
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Low Ripple Rejection
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Output Current
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APPLICATIONS
#
Mobile phones (PDC, GSM, CDMA, IMT200 etc.)
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Bluetooth equipment
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PDAs
#
Portable communication modem
#
Portable games
#
Cameras
#
Digital cameras
#
Cordless phones
#
Notebook computers
92%
10mV
500mA
(VIN=3.0V, VOUT=1.8V)*
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Oscillation Frequency
600kHz, 1.2MHz
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PWM fixed control
(XC9215 series)
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PWM/PFM automatic switching control (XC9216 series)
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Manual selection of switching control (XC9217 series)
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Maximum Duty Ratio
100%
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Ceramic Capacitor Compatible
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Ultra Small Packages
SOT-25, USP-6B
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GENERAL DESCRIPTION
The XC9215/9216/9217 series is a group of synchronous-rectification type
DC/DC converters with a built-in 0.6Ω P-channel driver transistor and 0.7Ω
N-channel switching transistor, designed to allow the use of ceramic
capacitors. The ICs enable a high efficiency, stable power supply with an
output current of 500mA to be configured using only a coil and two
capacitors connected externally.
Minimum operating voltage is 2.0V.
Output voltage is internally
programmable in a range from 0.9V to 4.0V in increments of 0.1V
(accuracy: ± 2.0%).
With the built-in oscillator, oscillation frequency is selectable from 600kHz
and 1.2MHz to make available the frequency best suited to your particular
application.
As for operation mode, the XC9215 series is PWM control, the XC9216
series is automatic PWM/PFM switching control and the XC9217 series
can be manually switched between the PWM control mode and the
automatic PWM/PFM switching control mode, allowing fast response, low
ripple and high efficiency over the full range of load (from light load to high
output current conditions).
The soft start and current control functions are internally optimized.
During standby, all circuits are shutdown to reduce current consumption to
as low as 1.0µA or less. With the built-in U.V.L.O. (Under Voltage Lock
Out) function, the internal P channel driver transistor is forced OFF when
input voltage becomes 1.4V or lower. Two types of package, 250mW
(SOT-25) and 100 mW (USP-6B), are available.
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FEATURES
P-ch Driver Tr. Built-in
N-ch
Synchronous Driver Tr. Built-in
Input Voltage Range
Output Voltage Range
High Efficiency
Output current
Oscillation Frequency
Ultra Small Packages
ON resistance 0.6Ω
ON resistance 0.7Ω
2.0 ~ 6.0V
0.9V~4.0V (100mV increments)
92% (TYP.)
(VIN=3.0V, VOUT=1.8V, IOUT=100mA)*
500mA
(VIN=3.0V, VOUT=1.8V)*
600kHz, 1.2MHz
(Fixed frequency accuracy +15%)
SOT-25 (SOT-23-5)
USP-6B
Soft-start circuit built-in
Current limiter circuit built-in (constant current & latching)
Low ESR ceramic capacitor compatible
* Performance depends on external components and wiring on the PCB.
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TYPICAL APPLICATION CIRCUIT
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TYPICAL PERFORMANCE CHARACTERISTICS
$
Efficiency vs. Output Current
VIN
CIN
(ceramic)
CE/MODE
L
1
2
3
VIN
VSS
CE/
VOUT
MODE
Lx
5
VOUT
(400mA)
CL
(ceramic)
XC9217A18C
100
90
80
L=3.3uH(CDRH3D16), CIN=4.7uF(ceramic), CL=10uF(ceramic), Topr=25
O
C
4
Efficiency:EFFI(%)
70
60
50
40
30
20
10
0
0.1
1
10
100
Output Current:IOUT(mA)
1000
PWM/PFM Automatic Switching Control
PWM Control
VIN=5.0V
VIN=3.6V
VIN=2.7V
Data Sheet
1
DC000003
XC9215/9216/9217 Series
500mA Synchronous Step-Down DC/DC Converters
"
PIN CONFIGURATION
Lx
5
VOUT
4
VIN 6
VSS 5
CE/MODE 4
1
VIN
3
2
VSS CE/MODE
1 LX
2 VSS
3 VOUT
SOT-25 (TOP VIEW)
USP-6B (BOTTOM VIEW)
* Please short the VSS pin (pin no. 2 and 5) before use.
Connection of the heat dissipation pad to any pin on
the circuit is not recommended. If the pad must be
connected due to a problem of heat dissipation or
mounting intensity, connect to the VSS pin (pin no. 5).
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PIN ASSIGNMENT
PIN NUMBER
SOT-25
USP-6B
1
2
3
4
5
6
2, 5
4
3
1
PIN NAME
VIN
VSS
CE / MODE
VOUT
Lx
FUNCTION
Power Input
Ground
Chip Enable Mode Switch
Output Voltage Sense
Switching Output
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PRODUCT CLASSIFICATION
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Ordering Information
XC9215123456
XC9216123456
XC9217123456
DESIGNATOR
SYMBOL
A
PWM fixed control
PWM / PFM automatic switching control
PWM fixed control
!
PWM / PFM automatic switching, manual switching
DESCRIPTION
Transistor built-in, Output voltage internally set (VOUT product), Soft start Internally set, Current limit 700mA
CE input logic High Active, CE pin open
CE input logic Low Active, CE pin open
CE input logic High Active, Pull-down resistor built-in
CE input logic Low Active, Pull-up resistor built-in
Output voltage:
e.g. 1.5V Output
"
2
= 1,
3
= 5
Package Types:
SOT-25 (SOT-23-5)
USP-6B
Device Orientation:
Embossed Tape : Standard Feed
Embossed Tape : Reverse Feed
(Standard)
(Semi-custom)
(Semi-custom)
(Semi-custom)
1
B
C
D
Integer
M
D
R
23
4
5
6
L
Data Sheet
2
DC000003
XC9215/9216/9217 Series
500mA Synchronous Step-Down DC/DC Converters
"
MARKING RULE
$
SOT-25 (SOT-23-5)
1234
SOT-25 (TOP VIEW)
Mark
1
Represents product series and the type of DC/DC converter
SYMBOL
PRODUCT SERIES
E
F
G
* Character inversion used.
XC9215A x x x M x
XC9216A x x x M x
XC9217A x x x M x
Mark
2
Represents the integer of output voltage and oscillation frequency
SYMBOL
OUTPUT VOLTAGE
FOSC=600kHz
FOSC=1.2MHz
(XC92 x x A
2
x 6 M x)
(XC92 x x A
2
x C M x )
0.X
1.X
2.X
3.X
4.X
0
1
2
3
4
0
1
2
3
4
Mark
3
Represents the decimal point of output voltage and oscillation frequency
SYMBOL
OUTPUT VOLTAGE
FOSC=600kHz
FOSC=1.2MHz
(XC92 x x A
3
x C M x )
(XC92 x x A
3
x 6 M x)
X.0
0
A
X.1
1
B
X.2
2
C
X.3
3
D
X.4
4
E
X.5
5
F
X.6
6
H
X.7
7
K
X.8
8
L
X.9
9
M
* Output voltage 0.9V ~ 4.0V (100mV increments) are standard products.
Please ask our sales contact for output voltages of 50mV increments (semi-custom products).
Mark
4
Represents production lot number
0 to 9, A to Z, reversed character of 0 to 9 and A to Z repeated (G, I, J, O, Q excepted)
Data Sheet
4
DC000003
XC9215/9216/9217 Series
500mA Synchronous Step-Down DC/DC Converters
"
MARKING RULE (Continued)
$
USP-6B
1
2
3
41
52
63
6
5
4
USP-6B (TOP VIEW)
Mark
1
Represents product series and the type of DC/DC converter
SYMBOL
PRODUCT SERIES
F
B
E
* Character inversion used.
XC9215A x x x D x
XC9216A x x x D x
XC9217A x x x D x
Mark
2
Represents the type of voltage regulators
SYMBOL
PRODUCT SERIES
A
XC92 x x A x x x D x
CURRENT LIMIT
700mA
Mark
3
Represents the integer of output voltage
SYMBOL
OUTPUT VOLTAGE
(XC92 x x A
3
x x D x)
0.X
1.X
2.X
3.X
4.X
0
1
2
3
4
Mark
3
Represents the decimal point of output voltage
SYMBOL
OUTPUT VOLTAGE
(XC92 x x A
4
x x D x)
X.0
0
X.1
1
X.2
2
X.3
3
X.4
4
X.5
5
X.6
6
X.7
7
X.8
8
X.9
9
* Output voltage 0.9V ~ 4.0V (100mV increments) are standard products.
Please ask our sales contact for output voltages of 50mV increments (semi-custom products).
Mark
5
Represents oscillation frequency
SYMBOL
PRODUCT SERIES
6
C
XC92 x x A x x 6 D x
XC92 x x A x x C D x
FREQUENCY
600kHz
1.2MHz
Mark
6
Represents production lot number
0 to 9, A to Z, reversed character of 0 to 9 and A to Z repeated (G, I, J, O, Q excepted)
Data Sheet
5
DC000003
RF/Wirelessly
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